Morote uke mainly defends Chūdan attacks from the inside out, but can also be used against Jōdan attacks. The concept of Morote uke is that one arm defends and the other reinforces the defending in a supportive manner.
As with uchi uke, a horizontal movement of the front elbow is required to completely cover the Chūdan area. The supporting arm should push the defending arm in time, even before contact with the attacking arm has occurred, so that the defending technique can benefit from the power from both arms.
Here you will find all information about the techniques in the video